PQI Turbo Memory 3200 (PQI3200-512SBU) --> Brainpower 808
PQI Turbo Memory 3200 (PQI3200-1024DPU) --> Brainpower 815
OCZ Platinum Rev 2 3200 (OCZ4001024ELDCPER2-K) --> BrainPower 808
Corsair XMS XL 4400C2.5 (CMX512-4400C25PT) --> Brainpower 815
Corsair XMS XL 3200 (CMX512-3200) --> Brainpower 815
Below is a picture of the two most common Brainpower PCB's side by side. As you can tell the differences can be seen even if the heat spreader was left on.

On a side note I talked with the owner of OCZ (ryan) yesterday and he said that OCZ is also using BrainPower 808a PCB's and they are regular height, so keep an eye out for those coming in the market. As noted in this thread BP PCB's are a bit shorter, but not on the new 808a PCB's. I also talked with Corsair Memory and they confirmed that they are going to start making all their XL modules on BrainPower 815 PCB's, so expect Corsair XMS XL PC-3200 modules to have BP 815's in the next few weeks just like the Corsair XMS 4400C25's have them now.